Piccardi
{{PatentInfo |Inventor=John Pinkney Gowland |Assignee=John Pinkney Gowland |Country=GB |ApplicationNum=721/44 |ApplicationDate=1944-01-14 |PatentNum=586917 |PatentDate=1947-04-08 |PriorityDate=1944-01-14 |Titolo=Improvements in or relating to Pens |Mar...